<template>
  <div :class="{ 'show': show }" class="header-search">
    <svg-icon class-name="search-icon" icon-class="search" @click.stop="click" />
    <el-select
      ref="headerSearchSelectRef"
      v-model="search"
      :remote-method="querySearch"
      filterable
      default-first-option
      remote
      placeholder="Search"
      class="header-search-select"
      @change="change"
    >
      <el-option v-for="option in options" :key="option.item.path" :value="option.item" :label="option.item.title.join(' > ')" />
    </el-select>
  </div>
</template>

<script setup>
import Fuse from 'fuse.js';
import { getNormalPath } from '@/utils/ruoyi';
import { isHttp } from '@/utils/validate';
import usePermissionStore from '@/store/modules/permission';

const search = ref('');
const options = ref([]);
const searchPool = ref([]);
const show = ref(false);
const fuse = ref(undefined);
const headerSearchSelectRef = ref(null);
const router = useRouter();
const routes = computed(() => usePermissionStore().routes);

function click() {
	show.value = !show.value;
	if (show.value) {
		headerSearchSelectRef.value && headerSearchSelectRef.value.focus();
	}
};
function close() {
	headerSearchSelectRef.value && headerSearchSelectRef.value.blur();
	options.value = [];
	show.value = false;
}
function change(val) {
	const path = val.path;
	const query = val.query;
	if (isHttp(path)) {
		// http(s):// 路径新窗口打开
		const pindex = path.indexOf('http');
		window.open(path.substr(pindex, path.length), '_blank');
	} else {
		if (query) {
			router.push({ path: path, query: JSON.parse(query) });
		} else {
			router.push(path);
		}
	}

	search.value = '';
	options.value = [];
	nextTick(() => {
		show.value = false;
	});
}
function initFuse(list) {
	fuse.value = new Fuse(list, {
		shouldSort: true,
		threshold: 0.4,
		location: 0,
		distance: 100,
		minMatchCharLength: 1,
		keys: [{
			name: 'title',
			weight: 0.7
		}, {
			name: 'path',
			weight: 0.3
		}]
	});
}
// Filter out the routes that can be displayed in the sidebar
// And generate the internationalized title
function generateRoutes(routes, basePath = '', prefixTitle = []) {
	let res = [];

	for (const r of routes) {
		// skip hidden router
		if (r.hidden) { continue; }
		const p = r.path.length > 0 && r.path[0] === '/' ? r.path : '/' + r.path;
		const data = {
			path: !isHttp(r.path) ? getNormalPath(basePath + p) : r.path,
			title: [...prefixTitle]
		};

		if (r.meta && r.meta.title) {
			data.title = [...data.title, r.meta.title];

			if (r.redirect !== 'noRedirect') {
				// only push the routes with title
				// special case: need to exclude parent router without redirect
				res.push(data);
			}
		}
		if (r.query) {
			data.query = r.query;
		}

		// recursive child routes
		if (r.children) {
			const tempRoutes = generateRoutes(r.children, data.path, data.title);
			if (tempRoutes.length >= 1) {
				res = [...res, ...tempRoutes];
			}
		}
	}
	return res;
}
function querySearch(query) {
	if (query !== '') {
		options.value = fuse.value.search(query);
	} else {
		options.value = [];
	}
}

onMounted(() => {
	searchPool.value = generateRoutes(routes.value);
});

watchEffect(() => {
	searchPool.value = generateRoutes(routes.value);
});

watch(show, (value) => {
	if (value) {
		document.body.addEventListener('click', close);
	} else {
		document.body.removeEventListener('click', close);
	}
});

watch(searchPool, (list) => {
	initFuse(list);
});
</script>

<style lang='scss' scoped>
.header-search {
  font-size: 0 !important;

  .search-icon {
    cursor: pointer;
    font-size: 18px;
    vertical-align: middle;
  }

  .header-search-select {
    font-size: 18px;
    transition: width 0.2s;
    width: 0;
    overflow: hidden;
    background: transparent;
    border-radius: 0;
    display: inline-block;
    vertical-align: middle;

    :deep(.el-input__inner) {
      border-radius: 0;
      border: 0;
      padding-left: 0;
      padding-right: 0;
      box-shadow: none !important;
      border-bottom: 1px solid #d9d9d9;
      vertical-align: middle;
    }
  }

  &.show {
    .header-search-select {
      width: 210px;
      margin-left: 10px;
    }
  }
}
</style>